- The special Controlled Screen Return spring mechanism for the Hapro CSR is very strong. It retracts the projection surface quickly for the first part and then slows down to roll into the case smoothly.- The Hapro CSR needs to be fully extracted. There are no intermediate stopping positions.- Easy to mount onto a wall or ceiling thanks to the Easy Install system.- The case and the projection screen surface can be made to exactly the right size and the case and slat bar are available in any colour for optimal integration into any interior.- The triangular slat bar retracts into the case for a clean finish.